Animated
Map of US - This animated map shows the formation of the United States
by county from the 1600s to present in increments of 10 years. The page
doesn't tell you how to stop the animation, however in Internet Explorer
you can use the "Stop" button on the menu to stop the download on a particular
year. To go to another year select "Refresh" and stop on the desired year.
In Netscape try using the stop button and reload.